class Calculator:
    def subtract(self,a,b):
        return a-b
    def add(self,a,b):
        return a+b

    def multiply(self, a, b):
        return a*b

    def divide  (self, a, b):
        return a / b

    def batch_multiply(self,list1,list2):
        result=[]
        for i in range(len(list1)):
            print(i)
            result.append(self.multiply(list1[i],list2[i]))
        return  result

if __name__ == '__main__':
    cal=Calculator()
    print(cal.batch_multiply([1,2,3],[4,5,6]))
